Improvement in inking apparatus for printing-machines



J. P. HUBBARD. Inking Apparatus for Printing-Machine No. 205,189.

Patented June 25,1878.

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UNITEDSTATES PATENT OFFICE.

JAMES F. HUBBARD, OF PLAINFIELD,NEW JERSEY, ASSIGNOR TO HIMSELF ANDCHARLES POTTER, JR, OF SAME PLACE.

IMPROVEMENT IN INKING APPARATUS FOR PRINTING-MACHlNES.

Specification forming part of Letters Patent No- 205,1S9, dated June 25,1878; application file December4, 1877.

To all whom it may concern:

Be it known that 1, JAMES F. HUBBARD, of Plainfield, county of Union, inthe State of New Jersey, have invented certain new and usefulImprovements in Inkin g Apparatus for Printing-Machines, of which thefollowing is a specification:

The improvement relates to the mounting of the inking-rollers. It is asimple and strong construction, and avoids some of the difficultiesincident to the ordinary modes of mount- 111g.

The following is a description of what I consider the best'means ofcarrying out the invention.

The accompanying drawing forms a part of this specification, and is aside elevation, showing the novel parts, with so much of the ordinaryparts as is necessary to indicate their relations thereto.

A is a portion of the fixed frame-work. B is a form of type carried onthe reciprocating table or bed B, which, it will be understood, istraversed backward and forward horizontally at each impression. A is astandard, which forms one of the bearin gs, in the ordinary manner, fora distributing-roller, D. It is also formed with shoulders at, thefunctions of which will presently appear.

E E are levers, turning on fixed centers 6, and formed with forks attheir upper extremities, which receive the bearings of inking-rollersGr. It will be understood that there is a stand, A, with shoulders or,on each side of the bed, and that there are two such levers E E,corresponding, on each side of the bed, to support the ends,respectively, of the single distributing-roller D and of the twoinkingrollers G G. Each lever E is formed with a slotted arm, E, whichreceives the pinchingscrew 13, by which it can be set firmly at therequired angle.

The shoulders at are inclined to a degree corresponding to the sweep oftheupper end of the corresponding lever E when in that part of its path.The'lheight of the shoulders a a, is just sufficient to cause them topress gently on the adjacent bearing of the roller Gr. 7

The location of the centers e and the lengths subsequent shrinkage.

of the levers E, and, consequently,the inclination of the shoulders to,are carefully determined, so that on slacking the pinching-screw F andswinging the levers E a little on their centers e the rollers G will, asthey aremoved apart, equally relax their pressure, on the one handagainst the distributing-roller D, and on the other hand against theform of type B. When the inking-rollers G are moved toward each other bythe swinging of their respective levers E in the proper directions, theycause the inking-rollers to increase their pressure equally against theform and against the distributing-roller.

Such an adjustment is necessary. It is useful not only to increase andrelax the pressure at will in obtaining a proper pressure at any giventime, but it is necessary afterward to change the position to compensatefor the inevitable shrinking of the inking-rollers.

Inking-rollers are formed with a thick surface of elastic composition,which will endure the oil of the ink and will be sufficiently soft toapply it well to the types. This composition shrinks with time, and thecenters of the rollers must be shifted to compensate for such shrinkage.

The construction which I have adopted will allow the adjustment of therollers outward and inward to a sufficient extent to compensate for allordinary inequalities in the diameters of the several rollers when theyare first constructed, and for all the variations due to The motion ofthe centers of the rolls G is almost exactly coincident in that part ofits motion with the dotted line m m, indicating theoretically places ofcenters which would exactly fulfill that condition through a stilllarger range of sizes.

The centers e are formed eccentrically on bolts, which may be turned andadjusted, when required, to raise and lowerthe centers a very little.This aids in the adjustment.

It will be observed that the dotted lines 10 p, which represent arcsfrom the centers e, so nearly coincide for a considerable distance withthe dotted line m m, which represents the line of equidistance from theform B and roller D, that they are practically the same.

The shoulder a corresponds to the sweep from the center 6. It allows theroller G to be moved inward as far as is ever required.

To remove the rollers G, the screws]? being slackened, the levers E areswung into a nearly upright position, carrying with them the rollers G.A turn of each pinching-screw F holds the levers in that position, andallows the rollers G to be removed and washed or exchanged. To returnthe'rollers again, or to introduce new ones, it is only necessary toplace each roller with its bearings in the forked ends-of the properlevers E E, and to slacken the screws F and move the levers E to theymore inclined position represented. The hand being applied to induce thedesired forcible contact with the distributing-roller and the .form, thescrew F is again tightened, and the roller-Gr is held in exactly theright position. If the roller shrinks, the screw F must be slackened andthe lever E pushed farther inward, and again secured. All the shrinkagewhich will ever occur can be readily compensated for by these means.

The motion is communicated in the ordinary manner to the several rollersto give them a surface-velocity exactly corresponding to that 0f theform.

I claim as my invention 1. In aprinting-press, the levers EE,-eccentrically pivoted at their lower ends, recessed at their upperends, and provided with the slotted arms E E, in combination with theinkin g-rollers G, distributing-roller D, and bed B, as hereinspecified.

2. In a printing-press, the shoulder a on the standards A, incombination with the rollers G, and with the levers E, having forks oropen-topped recesses, as and for the purposes herein specified.

In testimony whereof -I have hereunto set my name in the presence of twosubscribing witnesses.

JAMES F. HUBBARD.

Witnesses:

ANSON JUnsoN, J. M. FITIZWORTH.

